Question

Please help with questions 1, 2, and 3 as they all relate to eachother. Thanks!

equation list: AH = IH products - H reactants units of H: kJ/mol AS = ES products - ES reactants units of S: J/mol*K AG = AH-TAS units of G: kJ/mol You may type out answers or do calculations in excel. In either case you need to upload the completed assignment by 10AM on Saturday, March 28th component H(kJ/mol) SUJ/mol K) The table below shows thermodynamic properties at Mg2SiO. 2461.02 385.48 1800 K for forsterite (Mg2SiO4), a Mg-rich form of the Mgo -729.89 mineral olivine, which is abundant in mafic volcanic 113.14 4 rocks (olivine is a lovely green crystal, forming some sio 948.46 158.22 158.22 amazing green beaches in Iceland and Hawai'i). amazi Forsterite begins to crystallize from magmas around 1800 K. 1. Write the balanced chemical reaction for the formation of forsterite from its oxides. (4 pts) 2. Calculate the enthalpy of formation of forsterite from its oxides. (4 pts) 3. Based on your answer to #2, is this an endothermic or exothermic reaction? (3 pts) tion? (3 pts)

Answer 1

Given reaction: D 2MgO + SiO2 - Mg, siou 2) A Horn = { AHF product) - 2 at a { AHf Creactant) - AHFC M9, 5:04) - ( HFCS102) + 2xA HFP Mgo)) = -2461.02 kJ/mol - [2X (+729.89 kJ/mol ) - 948.46] II /mol , - - 2461.08 kJ/mol -[-1459.78 kJ/mol - 948.46 kJ/mor] 1-246108 + 2408.24) & I/mol Atran = -52.84 kJ/mol Energy is 3) as the Ahron is negative means released during the reaction. So, this reaction is exothermic. nned with CamScanner